On Wed, 22 Dec 2004 22:20:51 +0000, BigWallop wrote:

Dip the whole cartridge in metholated spirit and leave it for a day. Most
inks are based on something similar to metholated spirit as their solvent,
so it works wonders on cleaning the heads.

Isopropyl alchocol is also *very* good for this job - available from
friendly Chemist shops. No impurities either. Also handy for tape heads
etc.

Timbo